Engine control

Details Engine control Engine control

1983-04-04

1985-01-15

Moy, Magdalen Y. C.

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

123352, F02D 3100

Patent

active

044933037

ABSTRACT:
Fuel flow and/or engine speed is electrically controlled in accordance with a rate-of-change (acceleration or deceleration) value computed from one or more sensed parameters such as accelerator pedal position, throttle position, engine speed, exhaust temperature, intake manifold pressure, fuel temperature, etc. as well as stored engine parameters. A difference between a desired rate-of-change and a measured actual rate-of-change in engine speed is used to correspondingly change an engine control, for example a fuel control rack in a diesel engine fuel pump, a throttle valve in a carburetor, a timer for a fuel injection valve, a fuel valve to a turbine, or other control. The desired rate of change in engine speed may be critically damped, for example by multiplying by a percent or other fraction of a difference between a desired fuel flow and a present fuel flow, so as to avoid overshoot. The control may be operated in min-max, all-speed, cruise control or other special speed control modes, as well as incorporating altitude adjustment, pollution emission control, timing advance control, excessive speed control, fuel control recalibration, counting of selective numbers of pulses from a timing wheel with extension of time for slow speeds, manually selectable low idle adjustment, recordation of operation at excessive engine speed, operating time or other event, fuel consumption economy maximizing, and/or anti-tampering features.
In one particular application, the electronic control replaces a governor on a diesel engine and provides maximum power and torque control which may be changed by sensed changed operating conditions such as different transmission gear ranges. A standard computerized control can be employed for different engines with different engine parameters and manufacturing variations compensated by factors stored in ROM during final engine testing.

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